UNRWA

Work = noun [Countable] something created as a result of effort,

Mister MicawberWork = noun [Countable] something created as a result of effort,

I am much appreciated for your answer. Your have answered one part of my question, but why is this situation different from the normal one - I mean using the plural and not the singular.For example, in similar sentences we say 'a carpet factory, a shoe factory, a student book'.

nsfs2why is it 'works' and not 'work' ?

'work' and 'works' have different definitions. That makes this a very unusual case.

If it were 'work', it would mean 'labor' (not countable), but that's not what the agency deals with.
'works' is more like 'good deeds' (countable), and that's what the agency does.

CJ

Works, or Public Works, can refer to the construction, operation and maintenance by a government body of public infrastructure such as public buildings, roads, water and sewer systems, electrical grids, etc. This was part of the original mandate of UNRWA.

Blue Jayinfrastructure such as public buildings, roads, water and sewer systems, electrical grids, etc.

Thanks for the clarification. It seems I was barking up the wrong tree semantically even though the syntactic argument still holds.